CN112284273B - Method for measuring size of vertical cylindrical pocket thin-wall plastic bearing retainer pocket - Google Patents
Method for measuring size of vertical cylindrical pocket thin-wall plastic bearing retainer pocket Download PDFInfo
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- CN112284273B CN112284273B CN202011118759.1A CN202011118759A CN112284273B CN 112284273 B CN112284273 B CN 112284273B CN 202011118759 A CN202011118759 A CN 202011118759A CN 112284273 B CN112284273 B CN 112284273B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/08—Measuring arrangements characterised by the use of optical techniques for measuring diameters
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Abstract
A method for measuring the size of a pocket of a vertical cylindrical pocket thin-wall plastic bearing retainer relates to the technical field of mechanical measurement. The method aims to solve the problems that a traditional method is adopted for measuring the pocket holes of the vertical cylindrical pocket hole thin-wall plastic bearing cage, the effective measuring area in the pocket holes of the bearing cage is small, the measuring process is difficult, the working efficiency is low, and the error of the measured result is large. The method is adopted to maintain and carry out repeated measurement on the same vertical cylindrical pocket and carry out stability measurement of re-clamping, the measurement result is stable, the error of the measurement result is not more than 4 micrometers, the measurement precision is higher, as the tolerance of the diameter size of the pocket of the retainer is more than +/-0.02 mm, the tolerance is 0.04mm, the 'quarter principle' of measurement is met, the 4 mu m is less than 0.01mm, the measurement requirement is met, and the working efficiency is improved. The invention is suitable for measuring the size of the pocket of the vertical cylindrical pocket thin-wall plastic bearing cage.
Description
Technical Field
The invention relates to the technical field of mechanical measurement, in particular to a method for measuring the size of a pocket of a vertical cylindrical pocket thin-wall plastic bearing retainer.
Background
The retainer is mainly applied to heavy-load low-swing bearings, and the plastic material has good compatibility and certain tensile deformation recovery capability. Because the plastic thin-wall bearing retainer is processed by adopting an injection molding method, the mold drawing treatment is needed in the processing process of the retainer, the mold drawing process is implemented in parts, one part is drawn firstly and then the other part is drawn, thus the processing inconsistency of the pocket holes is inevitably caused, and the rest part of the pocket holes of the retainer is two discontinuous parts, so the effective measurement area is very small, the automatic measurement can not be carried out according to the conventional cylinder, and the measurement is very difficult. At present, an effective detection method for measuring the cage size is not available, so that the size of the pocket needs to be detected in order to ensure that the processed cage meets the design requirements, the inconsistency of the pocket caused by die drawing is controlled, and whether the pocket can meet the design requirements or not is judged.
In conclusion, the traditional method is adopted for measuring the pocket of the vertical cylindrical pocket thin-wall plastic bearing cage, and the problems that the effective measuring area in the pocket of the bearing cage is small, the measuring process is difficult, the working efficiency is low, and the error of the measured result is large are solved.
Disclosure of Invention
The invention provides a measuring method for measuring the size of a pocket of a vertical cylindrical pocket thin-wall plastic bearing retainer, aiming at solving the problems that the effective measuring area in the pocket of a bearing retainer is small, the measuring process is difficult, the working efficiency is low and the error of the measured result is large by adopting the traditional method for measuring the pocket of the vertical cylindrical pocket thin-wall plastic bearing retainer.
The invention relates to a method for measuring the size of a pocket of a vertical cylindrical pocket thin-wall plastic bearing retainer, which comprises the following steps:
fixing two vertical cylindrical pockets by using double faced adhesive tapes;
checking each angle of the probe on the rotary measuring seat by utilizing PC-DMS measuring software;
step three, manually establishing a coordinate system, manually leveling the end face of the bearing retainer by using a vertical probe, determining a coordinate system A1 by using an outer diameter circle, measuring each point on the left and right of the pocket of the cylindrical pocket retainer by using a horizontal probe, forming a coordinate system X axis with an outer diameter center connecting line, and establishing an A2 coordinate system by using the center of the outer diameter center connecting line as an origin;
automatically measuring and aligning the end face of the bearing retainer by using a vertical probe, establishing an A3 coordinate system by using the center of an outer diameter circle as an origin, and forming an X axis of an A4 coordinate system by using a connecting line of a middle point during manual measurement and the center of the automatically measured outer diameter;
translating the coordinate system of A4 to the center of the cylindrical pocket of the bearing retainer, wherein the coordinate system is changed into an A5 coordinate system;
step six, automatically generating a point at the maximum diameter position under an A5 coordinate system, wherein the vector direction is the positive direction of the Y axis of the A5 coordinate system, and utilizing the function of a PC-DNS software array to array the point to obtain the diameter size of the first pocket;
step seven, measuring the residual cylindrical pockets of the retainer, returning to an A4 coordinate system, arraying the measuring points of the first cylindrical pocket according to the number of the cage pockets divided into equal parts by using the array function of the PC-DMS software, automatically generating the measuring points of all the cylindrical pockets of the retainer, and performing the step one to the step six for all the cylindrical pockets once again to obtain the diameter size of each cage pocket;
furthermore, the specific method for fixing the two vertical cylindrical pockets by using the double-sided adhesive tape in the first step is as follows; because the vertical thin-wall plastic bearing retainer pocket, choose the high-viscosity two-sided adhesive to stick two retainers together and clamp;
further, the diameter of the vertical probe and the horizontal probe in the third step and the fourth step is 3 mm;
further, in the sixth step, the specific step of using the function of the PC-DNS software array to array the point is as follows:
sixthly, respectively arraying the point according to two points of 1 degree clockwise and 1 degree anticlockwise by using the function of a PC-DNS software array, so that the measuring points are effectively distributed on one side of the working surface of the cylindrical pocket, and the measuring points on the other side are obtained by using a mirror image command;
sixthly, obtaining measurement points of the other two cross sections in the same mode;
sixthly, constructing three cross-section points of the cylindrical vertical pocket into a cylinder by using a construction function of three-coordinate software, and evaluating the diameter of the cylindrical pocket of the retainer;
further, the error of all coordinate system establishment in the third step to the sixth step is not more than (2.1+3.3L/1000) μm.
Compared with the prior art, the invention has the following beneficial effects:
the invention overcomes the defects of the prior art, the method is adopted to maintain and repeatedly measure the same vertical cylindrical pocket and measure the stability of re-clamping, the measurement result is stable, the error of the measurement result is not more than 4 micrometers, the measurement precision is higher, the tolerance of the diameter size of the cage pocket is more than +/-0.02 mm, the tolerance is 0.04mm, the 'quarter principle' of measurement is met, the 4 mu m is less than 0.01mm, the measurement requirement is met, and the working efficiency is improved.
Secondly, the measuring process of the invention is simple and convenient to use.
Drawings
FIG. 1 is a flow chart of a method of measuring a vertical cylindrical pocket thin wall plastic bearing retainer pocket dimension according to the present invention;
FIG. 2 is a side view of a measured vertical cylindrical pocket thin-walled plastic bearing cage of the present invention;
FIG. 3 is a cross-sectional view A-A of a measured vertical cylindrical pocket thin-walled plastic bearing cage of the present invention;
FIG. 4 is a schematic view of the clamping of two cages in the measuring method for measuring the dimensions of the pockets of the vertical cylindrical pocket thin-walled plastic bearing cage according to the present invention;
FIG. 5 is a coordinate system established in a method of measuring the dimensions of a vertical cylindrical pocket thin wall plastic bearing retainer pocket according to the present invention;
FIG. 6 is a schematic view of a translation coordinate system to the center of the cage in a measurement method of measuring the dimensions of the vertical cylindrical pocket thin wall plastic bearing cage pockets in accordance with the present invention.
Detailed Description
The first embodiment is as follows: the embodiment is described with reference to fig. 1 to 6, and the method for measuring the dimension of the pocket of the plastic bearing retainer for a vertical cylindrical pocket thin wall according to the embodiment comprises the following specific steps:
fixing two vertical cylindrical pockets by using double faced adhesive tapes;
checking each angle of the probe on the rotary measuring seat by utilizing PC-DMS measuring software;
step three, manually establishing a coordinate system, manually leveling the end face of the bearing retainer by using a vertical probe, determining a coordinate system A1 by using an outer diameter circle, measuring each point on the left and right of the pocket of the cylindrical pocket retainer by using a horizontal probe, forming a coordinate system X axis with an outer diameter center connecting line, and establishing an A2 coordinate system by using the center of the outer diameter center connecting line as an origin;
automatically measuring and aligning the end face of the bearing retainer by using a vertical probe, establishing an A3 coordinate system by using the center of an outer diameter circle as an origin, and forming an X axis of an A4 coordinate system by using a connecting line of a middle point during manual measurement and the center of the automatically measured outer diameter;
translating the coordinate system of A4 to the center of the cylindrical pocket of the bearing retainer, wherein the coordinate system is changed into an A5 coordinate system;
step six, automatically generating a point at the maximum diameter position under an A5 coordinate system, wherein the vector direction is the positive direction of the Y axis of the A5 coordinate system, and utilizing the function of a PC-DNS software array to array the point to obtain the diameter size of the first pocket;
step seven, measuring the residual cylindrical pockets of the retainer, returning to an A4 coordinate system, arraying the measuring points of the first cylindrical pocket according to the number of the cage pockets divided into equal parts by using the array function of the PC-DMS software, automatically generating the measuring points of all the cylindrical pockets of the retainer, and performing the step one to the step six for all the cylindrical pockets once again to obtain the diameter size of each cage pocket;
according to the specific embodiment, the method is adopted to maintain and repeatedly measure the same vertical cylindrical pocket and measure the stability of re-clamping, the measurement result is stable, the error of the measurement result is not more than 4 micrometers, the measurement precision is higher, the tolerance of the diameter size of the cage pocket is more than +/-0.02 mm and is 0.04mm, the 'quarter principle' of measurement is met, the 4 mu m is less than 0.01mm, the measurement requirement is met, and the working efficiency is improved;
determining a detection scheme of the pockets of the vertical thin-wall plastic bearing retainer according to theoretical values given by a detection drawing of the cylindrical pockets of the vertical thin-wall plastic bearing retainer, respectively determining the Z-axis direction of a workpiece coordinate system by using end faces, determining the circle center of the workpiece coordinate system by using an outer diameter circle, determining the X-axis direction of the workpiece coordinate system by using the center of any one cylindrical retainer pocket and the outer diameter circle center, establishing a retainer workpiece coordinate system XYZ, translating the retainer workpiece coordinate system to the center of the cylindrical pockets of the retainer according to the theoretical coordinates of the pockets of the retainer, changing the coordinate system into X1Y1Z1, automatically generating a point at the maximum diameter position of the cylindrical pockets of the retainer, wherein the proper direction is the Y1 positive direction, respectively arraying the points according to clockwise and anticlockwise 1 degree by using the functions of a PC-DMIS software array, and effectively distributing the measurement points on one side of the working surface of the cylindrical vertical pocket retainer, and finally, the measurement points of the previous first cylindrical pocket are arrayed according to the equal division number of the cage pockets by using the array function to generate the measurement points of all the cage pockets, and finally the points of all the pockets are executed once to obtain the diameter size of each cage pocket.
The second embodiment is as follows: referring to fig. 1, the present embodiment is described as a further limitation of the measurement method of the first embodiment, which is a measurement method for measuring the dimensions of the pocket of the plastic bearing retainer for thin wall of the vertical cylindrical pocket, wherein the first step is to fix the two vertical cylindrical pockets by using the double-sided adhesive tape; because the vertical thin-wall plastic bearing retainer pocket, choose the high-viscosity two-sided adhesive to stick two retainers together and clamp;
in the specific embodiment, the measuring requirements for measuring the diameters of the pockets of the plastic vertical pocket cage are met by means of clamping high-viscosity double faced adhesive tapes, measuring programs and the like, and the problem of detection of the cage entering a factory for acceptance is solved.
The third concrete implementation mode: the present embodiment is described with reference to fig. 1, which is a further limitation of the measuring method of the first embodiment, the measuring method of the present embodiment is used for measuring the dimensions of the pocket of the plastic bearing holder with thin wall of the vertical cylindrical pocket, and the diameter of the vertical probe and the horizontal probe in the third step and the fourth step is 3 mm;
in the specific embodiment, the diameters of the vertical probe and the horizontal probe are 3mm, so that the measurement is convenient.
The fourth concrete implementation mode: in the sixth step, the specific steps of using the function of the PC-DNS software array to array the points are as follows:
sixthly, respectively arraying the point according to two points of 1 degree clockwise and 1 degree anticlockwise by using the function of a PC-DNS software array, so that the measuring points are effectively distributed on one side of the working surface of the cylindrical pocket, and the measuring points on the other side are obtained by using a mirror image command;
sixthly, obtaining measurement points of the other two cross sections in the same mode;
and sixthly, constructing three cross-section points of the cylindrical vertical pocket into a cylinder by using a construction function of three-coordinate software, and evaluating the diameter of the cylindrical pocket of the cage.
The fifth concrete implementation mode: the embodiment is described with reference to fig. 1, which is a further limitation of the measuring method of the first embodiment, the measuring method of the embodiment is used for measuring the dimension of the pocket of the plastic bearing retainer with thin wall of the vertical cylindrical pocket, and the error of all coordinate systems established in the third step to the sixth step is not more than (2.1+3.3L/1000) μm;
in the specific embodiment, the error established by the coordinate system is not more than (2.1+3.3L/1000) mu m, so that the measurement precision is improved.
Claims (5)
1. The utility model provides a measure vertical cylindrical pocket hole thin wall plastic bearing retainer pocket hole size's measuring method which characterized in that: the specific method comprises the following steps:
fixing two vertical cylindrical pockets by using double faced adhesive tapes;
checking each angle of the probe on the rotary measuring seat by utilizing PC-DMIS measuring software;
step three, manually establishing a coordinate system, manually leveling the end face of the bearing retainer by using a vertical probe, determining a coordinate system A1 by using an outer diameter circle, measuring each point on the left and right of a pocket of the cylindrical pocket retainer by using a horizontal probe, forming a coordinate system X axis with an outer diameter center connecting line, and establishing an A2 coordinate system by using the center of the outer diameter center connecting line as an origin;
automatically measuring and aligning the end face of the bearing retainer by using a vertical probe, establishing an A3 coordinate system by using the center of an outer diameter circle as an origin, and forming an X axis of an A4 coordinate system by using a connecting line of a middle point during manual measurement and the center of the automatically measured outer diameter;
translating the coordinate system A4 to the center of the cylindrical pocket of the bearing retainer, wherein the coordinate system is changed into a5 coordinate system;
step six, automatically generating a point at the maximum diameter position under an A5 coordinate system, wherein the vector direction is the positive direction of the Y axis of the A5 coordinate system, and utilizing the function of a PC-DMIS software array to array the point to obtain the diameter size of the first pocket;
and step seven, measuring the residual cage cylindrical pockets, returning to an A4 coordinate system, arraying the previous measuring points of the first cylindrical pocket according to the number of the cage cylindrical pockets by using the array function of the PC-DMIS software, automatically generating the measuring points of all the cage cylindrical pockets, and performing the step one to the step six on all the cylindrical pockets once again to obtain the diameter size of each cage pocket.
2. The method of claim 1, wherein the method comprises the steps of: the specific method for fixing the two vertical cylindrical pockets by using the double-sided adhesive tape in the first step is as follows; because the vertical cylindrical pocket hole thin-wall plastic bearing retainer pocket hole selects high-viscosity double faced adhesive tape to stick the two retainers together for clamping.
3. The method of claim 1, wherein the method comprises the steps of: the diameters of the vertical probe and the horizontal probe in the third step and the fourth step are 3 mm.
4. The method of claim 1, wherein the method comprises the steps of: in the sixth step, the specific steps of utilizing the function of the PC-DMIS software array to array the point are as follows:
sixthly, respectively arraying the point according to two points of 1 degree clockwise and 1 degree anticlockwise by using the function of the PC-DMIS software array, so that the measuring points are effectively distributed on one side of the working surface of the cylindrical pocket, and the measuring points on the other side are obtained by using a mirror image command;
sixthly, obtaining measurement points of the other two cross sections in the same mode;
and sixthly, constructing three cross-section points of the vertical cylindrical pocket into a cylinder by using a construction function of three-coordinate software, and evaluating the diameter of the cylindrical pocket of the retainer.
5. The method of claim 1, wherein the method comprises the steps of: and establishing errors of all coordinate systems in the third step to the sixth step, wherein the errors are not more than 2.1+3.3L/1000 mu m.
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| CN202011118759.1A CN112284273B (en) | 2020-10-19 | 2020-10-19 | Method for measuring size of vertical cylindrical pocket thin-wall plastic bearing retainer pocket |
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| CN112284273B true CN112284273B (en) | 2022-02-08 |
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2020
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